Add sk_sp helpers and switch Blink SkShader clients to the new APIs

third_party/WebKit/Source/platform/graphics/paint/SkPictureBuilder.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SkPictureBuilder_h
 #define SkPictureBuilder_h
 
 #include "platform/RuntimeEnabledFeatures.h"
 #include "platform/graphics/GraphicsContext.h"
 #include "platform/graphics/paint/PaintController.h"
@@ skipping 20 matching lines @@
         m_context = adoptPtr(new GraphicsContext(*m_paintController, disabledMode, metaData));
 
         if (containingContext) {
             m_context->setDeviceScaleFactor(containingContext->deviceScaleFactor());
             m_context->setPrinting(containingContext->printing());
         }
     }
 
     GraphicsContext& context() { return *m_context; }
 
-    PassRefPtr<const SkPicture> endRecording()
+    PassRefPtr<SkPicture> endRecording()
     {
         m_context->beginRecording(m_bounds);
         m_paintController->endSkippingCache();
         m_paintController->commitNewDisplayItems();
         m_paintController->paintArtifact().replay(*m_context);
         return m_context->endRecording();
     }
 
 private:
     OwnPtr<PaintController> m_paintController;
     OwnPtr<GraphicsContext> m_context;
     FloatRect m_bounds;
 };
 
 } // namespace blink
 
 #endif // SkPictureBuilder_h